More than 80,000 people have died in the UK within 28 days of a positive Covid test since the start of the pandemic, official figures have shown.
A further 1,035 deaths in the UK were reported on Saturday, taking the total by that measure to 80,868.
The number of daily cases of people who tested positive for coronavirus increased by 59,937.
Only the US, Brazil, India and Mexico have recorded more Covid deaths, according to Johns Hopkins University.
It is the fourth day in a row that the UK has reported more than 1,000 daily deaths.
It comes as scientists advising the government have warned that lockdown measures in England need to be stricter to achieve the same impact as the March shutdown.
Meanwhile, Buckingham Palace has said the Queen, 94, and the Duke of Edinburgh, 99, received Covid-19 vaccinations on Saturday.
The Office for National Statistics recently estimated as many as one in 50 people in England had coronavirus between 27 December and 2 January, while in London it was one in 30.
Official figures from Public Health England showed London had the highest regional case rate in the UK, exceeding 1,000 per 100,000 people.
Under the national lockdown, people in England must stay at home and can only go out for essential reasons. Similar measures are in place across most of Scotland, in Wales and Northern Ireland.
Prof Robert West, a participant in the Scientific Pandemic Influenza Group on Behaviours (SPI-B), which advises the government’s Scientific Advisory Group for Emergencies (Sage), said the current rules were “still allowing a lot of activity which is spreading the virus”.
He said the new variant of Covid was around 50% more infectious compared to the virus that infected people last March.
“That means that if we were to achieve the same result as we got in March we would have to have a stricter lockdown, and it (the current regime) is not stricter,” he added.
The professor of h